AHR1985 {MASSTIMATE}

Body Mass Estimates Using Anderson et al. (1985)

Description

This function estimates body mass based on humeral and/or femoral circumferences using the quadrupedal and bipedal equations of Anderson et al. (1985)

Usage

AHR1985(HC = NULL, FC, equation = c("bip", "quad"), data=NULL)

Arguments

HC

an optional value or vector representing humeral circumference (in mm)

FC

a value or vector representing femoral circumference (in mm)

equation

desired estimation equation. Two possible choices: "quad", "bip"

data

an optional object of class = "data.frame" or class = "matrix"

Details

If equation = "bip" then only femoral circumference is needed. Both humeral and femoral circumference are needed to estimate body mass of a quadruped (equation = "quad"). If a data object is specified, the mass estiamtes will be added as a column to the data.frame or matrix within that object.

Value

AHR1985

A numeric value or vector representing the mass estimate(s) in grams

Author(s)

Nicolas E. Campione

References

Anderson, J. F., Hall-Martin, A. and Russell, D.A. (1985) Long-bone circumference and weight in mammals, birds and dinosaurs. Journal of the Zoological Society of London A, 207, 53-61.

See Also

QE cQE quadrupeds bipeds CM1992 CF2004 MCF2004

Examples

##Quadrupedal dinosaurs
data(dinos)
AHR1985(dinos$HC, dinos$FC, equation = "quad", data = dinos)

##Bipedal dinosaurs
data(dinosbip)
AHR1985(HC=NULL, dinosbip$FC, equation = "bip", data = dinosbip)